The Influence of Chirality on the Phase Behaviour of a Fluoro-Substituted Tolan Derivative Exhibiting a Direct TGB to BP Transition
作者:
Peter Jamée,
Guido Pitsi,
Min-Hui Li,
Hu-Tinh Nguyen,
Gilles Sigaud,
Jan Thoen,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 351,
issue 1
页码: 111-118
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023259
出版商: Taylor & Francis Group
关键词: phase transitions;chirality;TGB;Blue phases
数据来源: Taylor
摘要:
We have investigated the phase behaviour as a function of enantiomeric excess of a fluorosubstituted tolan derivative, FH/FH/HH18BTMHC, using high-resolution adiabatic scanning calorimetry (ASC). This substance exhibits a direct TGB to BP transition. Mixing (R) and (S) enantiomers permits us to vary the chirality of these mixtures without much effect on other parameters. Changes in transition temperature are studied, as well as the enthalpy changes and latent heats at the various transitions which can be measured directly using ASC. A supercritical BPIII-I transition evolving towards a critical point is observed.
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